
Trapped in a sinking submarine, two players must communicate through walkie-talkies to solve puzzles, complete tasks, navigate the depths, and escape before time runs out.
Revenue comes from in-game items and microtransactions, which our price-based model doesn't estimate. Copies below reflect the player base, not paid sales.
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About

You're trapped in an old Cold War submarine. Your only goal: survive. Complete urgent repairs, manage limited resources, and keep the systems running. You can’t see each other. One misstep, one wrong call, and it’s all over.
Use your voice. Trust your partner. And don't run out of time.

You’ll never make it alone. Communicate through a crackling walkie-talkie. One speaks, the other listens - no exceptions. Relay codes, fix malfunctions, and guide each other through a maze of rust, steam, and shadows.
Forget clear sight. All you’ve got is each other’s voice. Keep it steady.

Time is not your friend. Each second wasted brings your doom closer - flooding compartments, failing engines, failing minds. Complete your tasks quickly. Stay calm under pressure. And if you mess up?
You’ll hear it. Feel it. Maybe even see it... before the ocean swallows you whole.
Genres
Stats
Languages: English
Engagement
Reviews
Themes across 44 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
Short and Sweet cant wait more updates
The game is a little confusing at first, but you can figure it out after a try or two. The hardest part ends up being just reading the code for the diagnostics. Not too bad but very barebones as you can see that no review has over 2 hours of playtime. But hey, free is free so give it a shot.
Fun hour long time sink. was good overall, fun idea mostly well executed asides from two things: one, once you finish a round win or lose you have to restart the entire game and two, the text on the console for the captain is incredibly hard to read quickly. I really enjoyed the game though and I'd return to it with a friend now and then if these issues were fixed or if the game was expanded upon more.
Related
Related
Trends
Concurrent players on Steam, sampled daily since tracking started.
Hours played at review time, across 44 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
С друзьями весело, но коротко, хачу ещё
класс прямо как во 2 тим фортрест
For a game centered around voice chat, you would think they would make it actually work and not be a broken mess. But then again, look at the developer's name. Can't recommend.
müll
yeah don't ever ask for help from the terminal
can always count on low effort interactive to deliver a quality product in all seriousness, the voicechat was buggy, there was a incredible lack of settings, the game was very short, fps wasn't the greatest especially for a small submarine like that, and the events were a bit boring and easy. all things considered though, it's a free game.
Sync Or Sink is a co-op game where one player acts as the captain and the other handles repairs aboard a failing submarine. The concept is simple, and it definitely creates some tense and funny moments. That said, the workload feels very uneven. The repair role is fairly straightforward: grab the right tools and fix what the captain tells you to fix. The captain, meanwhile, has to identify problems, locate rooms, manage resources, navigate the submarine, and somehow figure out when to fire torpedoes. The result is pure chaos, which I suppose is part of the fun. My friend and I spent most of our playthrough scrambling to keep the submarine alive while having absolutely no idea what was actually killing us. We eventually won with 1% health left after desperately spamming torpedoes randomly and hoping for the best. It's not a bad game, but it's also not one that kept us coming back after we cleared it. A decent choice for a chaotic evening with friends, especially if you're looking for something that tests communication more than skill.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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